Grinding machine



March l, 1938.

R. H, CRAMER GRINDING MACHINE Filed Jan. l1, 1935 5 Sheets-Shea?l l[NMEA/TOR' RaW/OND mgfmM/sm H/s wrok/w:

March 1, 1938.

. H. CRAMER GRINDING MACHINE Filed Jan. ll, 1955 5 Sheets-Sheet 2 /E 122/24 /60 /62 /22 /EO v I/wE/vToR.'

RHYMo/VD H. MER,

#asm-m March l, 1938. R H, @5mn/EF@l 2,109,524 I GRINDING MACHINE FiledJan. ll, 1955 5 Sheets-Sheet 3 JN VEA/TOR.' fm ND fi/WER,

HIS HTTOR'NEX March l, 1938. R. H; CRAMER GRINDING MACHINE 5Sheets-Sheet 4 Filed Jan.' ll, 1955 I/wE/vro Rav/HOND qgrHMsR, 5%

GRINDING MACHINE Filed Jan. ll, 1935 5 Sheets-Sheet 5 Rm" o/vo MER, 1%#

- Patented Mar. 1, 1938 UNITED STATE GRINDING MACHINE Raymond H. Cramer,

General Motors Corporation,

Newark, N. J., assignor to Detroit, Mich., a

corporation of Delaware Application January 11, 1935, Serial No. 1,414

43 Claims.

This 'invention relates to grinding machines and comprises all of thekfeatures of novelty here,

ject is to provide improved loading and unloadin'g mechanism formachines of this general character, such that there is little time lostin exchanging workpieces and the operation ple, direct and positive witheasy setup or adjustment when sizes change. Still another object is toprovide an improved idler wheel mounting. Yet another object is toimprove the mechanism for controlling the pressure idler, ejector. and

gauge.

To these ends and also to improve generally upon machines of thischaracter, the invention consists in the vvarious matters hereinafterdescribed and claimed. In its broader aspects, the invention is notnecessarily limited tothe speciiic construction selected forillustrative purposes in the accompanying drawings in which- Fig. 1 is aplan view of the machine with some parts broken away and in section, thepressure idler, ejector and magazine being removed.

Fig. 2 is an isometric view of a cam plate.

Fig. 3 is a plan view of a lever.

Fig.4 is an end view of the machine with the reciprocating table and aportion of the main frame in vertical section.

Fig. 5 is a sectional view on the line 5 of Fig. 4. Fig. 6 is a sideview of a gauge bracket.

Fig. 7 is a iront view of a portion of the machine, the pressure idlerbeing broken o.

Fig. 8 is an end view with parts broken away and in section.

Fig. 9 is a vertical sectional view of a portion of the gauge rod andassociated parts.

Fig. l0 is a front view of a portion ofthe gauge mechanism, some of theassociatedl parts being broken away and in section. f

Fig. 11 is an end view of a modication.

Fig. 12 is a view like Fig.' 11 but with certain parts in anotherposition. n Fig. -13 is a plan view of a ller plate.,` Figs. 14 to 1'?inclusiveare diagrammatic end views illustrating the workieedlng andejecting mechanism in different positions. 18 lis, a side View ofabracket and Fig-19 is a sectional view of the magazine outlet. ,Y

Stated generally, the machine comprises a work head having a sexies ofwheels or lrollers :which being simy peripherally engage a hollowwork-,piece and con.

trol its rotation while a high speed grinding wheel engages the innerwall of the work-piece to grind the bore. The work-head reciprocatesunder control of any suitable hydraulic drive, as in the. Well knownHeald internall grinder, while the grinding wheel is fed radially of thework. Gauge plugs repeatedly engage the end of the work and successivelyenter its bore as the piece is ground to corresponding dimensions, suchentry of the gauge plugs controlling successive amplified `movements ofthe work head, as for wheel dressing and unloading the work. The work isfed 'from a magazine, feeding and ejecting being automaticallycontrolled by the movements of the work head. I A main frame 2 (Fig. 4)is provided with ways 4 and 6 for a reciprocating table or slide 8 whichcontains a drain opening l0 for cooling medium. A supporting fillerplate I2 is secured to the top of the table or slide 8 by a pivot studI4 and T- headed clamping bolts I6. The pivot stud allows angularadjustment of the filler plate in order that all of the supported partscan be lined up with the table ways or, if desired, it can be angledwith respect to the table, as when tapered work is being'ground. Toallow this angular adjustment, the table is provided with undercut slotsi8 which are curved about a center at the pivot (see Fig. 13) vThe llerplate I2 has a slot 20 to receive a cam, a shallow round recess 22 for alocating plug, and ahollow lug 24 to support a guide rod, all as willlater appear in detail.

The filler plate I2 has arear extension or pad 26 supporting a bracket28 carrying an electric motor 30, the motor having its feet providedwith T-headed clamping bolts 32 to secure the motor in adjustedposition." The motor has a driving pulley 34 (Fig. 1) connected byV-type belts 36 to a pu1ley`38 on ya shaft 40 which is rotatablyjournalled in a head casting 42.v The head casting has feet 44 securedby'bolts 46 to a base plate 48,

screws adjustable inlugs of the base plate abutting against the feet 44for locating the head -casting inv adjusting position. The base plate islocated onvthe filler plate I2 by a circular locating plug-52 (Figs.

mentioned rece'ss'22 ofthe -i'lller plate.

'I'hat end'of the shaft 40 which is lopposite to the'pulley 38 overhangsthe vhead and supports fa'regulatirlg Awheel 54 (Fig." 4)which isclamped `to the shaft by la washerI 56 and a nut 58.

` 60 is detachably' secured tothe regulating wheel by screws enteringbayonet slots- 62 in the ring. j 4`Tl'ieflingis alittle' larger indiameter-than the Wheelftoprovideaprojecting flange 64 which `A Ting 8and 10) which enters the beforework-piece W and prevents the Work frommovy ingendwise in one direction. The ange is thus made removable sothat the regulating wheel 64 can be faced off or true'd by reciprocatingit axially along the grinding wheel G.

The work W- isv rotatably supported by a supporting idler wheel 66 whichis adjustable along an incline in order 'to support work of all di'-ameters at the same level, and preferably theV axis of the work is in acommon plane with the axis of the grinding wheel and the axis of theregulating wheel. The wheel 66 is hollow and contains two separatedpairs of ball bearings 68 Fig. 1) whose outer race rings are retained byring nut 10. The inner race rings of these bearings are spaced apart inpairs by a sleeve 12 surrounding a supporting shaft 14. Such inner racerings and sleeve are clamped as -a unit against-a shoulder of the shaftby'a nut 16'. One end of the shaft 141s secured by a screw 18 in an openseat of a standard 80 carried by a slide 82. Another standard 84 hasa\similar open seat (Fig. 4) in which a segmental extension of the shaftis fastened by a. screw 86. This end of the shaft receives a greasefitting 88 communicating with suitable ports to conduct lubricant to thebearings.

One end of thef slide 82 has a slotted extension 90 (Fig. 7) for aclamping bolt 82 and the other end of the slidehas a bevelled face 94engaged by a bevelled lip on ya. clamping plate 86 which is secured by ascrew 88 to the base plate 48. The base plateis inclined and has a guideslot receiving a tongue |02 on the slide. tongue is tapped to receive anadjusting screw |04 which is journalled for rotation without endwisemovement in a plate |06 fastened at the front of the base plate. A handwheel |08 provides i'or turning the screw to adjust the slide and thesupporting idler 66 to the correct posi- .tion for supporting work ofthe selected size with the centerl at a predetermined level. Tangent tothe idler 66 and inclined downwardly therefrom, is a discharge chute ||0(Fig. 4) supported on a bent bracket ||2 which in turn *is supported by-a bracket ||4 on the base plate.

The remaining work-engaging wheel or roller ls a pressure idler wheel|20 (Figs. 4 and 5) urged by spring pressure'against the work andautomatically raised when the work is ejected from grinding position.'Ihe wheel is hollow and contains a pair of ball bearings |22 whoseouter race rings are spaced apart by a sleeve |24 while ring nuts |26clamp the race rings in the wheel. The inner race rings are spaced by asleeve |28 having flanges |30 with oil passages.' The inner race ringsand the sleeve |28 are clamped as a unit against a shouldered sleeve |82by a nut |33. The sleeve |02 is carried by a shouldered supporting shaft|24 having a ball-segment |88 at one end. 'I'he segment has universaladjustment in a similarly shaped seat in an arm |38, a portion of theseat being formed on a detachable nut |40 threaded in the arm. The arm|88 is connected by a web or guard |42 to a companiqn arm |44 and theconnected armsare mounted for rocking'movement on an axis above theregulating wheel, as will appear. The arm |44 has an opening receiving athimble |46 which is secured to the shaft |84 by a screw |40. 'I'hethimble is externally four-sided or provided with ilats engaged by twopairs of opposed set screws |60 threaded in the arm |44. By looseningone screw and tightening the opposite one. the shaft The |34..and hencethe idler wheel |20, can be skewed with respect to the work therebyproducing a tendency to urge the workA endwise and hold it against anabutment. 'I'hus the work can be held from endwise movement on itssupports when the work and the grinding wheel have a relative ax/ialreciprocation.

To lubricate the idler wheel |20, a grease iitting |52 leads to acentral passage |54 communicating by a radial port |56 with aperipherally'extending groove |58 on the exterior of the shaft |34.l

'I'he groove |58 communicates by a radial port in thesleeve |32 with vaperipheral groove |60 1n the'l'nterior of the sleeve |28, and a. radialport; |62 leads from the groove |60 to the space betweenthe flanges 30.Lubricant forced into this -spac'e has access through thebefore-mentioned ports in the flanges |30 to the bearings. The lubricantis retained in the wheel by suitable packings |64 in the ring nuts |26and by overlapping anges on these nuts and the nuts |33.

'I'he arms ,|88 and |44 have their upper ends or-hubs split (Figs. 1 and7) and clamped by screws |10 to a rock shaft |12.which is journalled inlugs |14 projecting forwardly-from a bracket |16, the lugs |14 beingfastened by screws |18 to upwardly extending lugs on the head casting42. 'Ihe bracket |16 has an extended-portion |80 between the arms |38and |44 and, at the rear, a pipe |82 leads to -a chamber |84 in theextension. Wateradmitted from the pipe to the chamber is sprayed downthrough a slit |86 ontothe regulating wheel and keeps its surface andthat of th' work clean and cool. The chamber is closed at the end by athreaded plug |88. A third arm |90 is vclamped by` a screw |92 to theoverhanging end of the rock shaft |12, one side of the arm beinglongitudinally grooved to receive an extension arm |84 which isadjustably secured in the groove by screws` |86. The extension armterminates in a laterally 'directed work ejector |88 of substantiallytriangular cross section. I'he ejector has a notch to make it clear theregulating wheel flange 64 and so lies close along the regulating wheeljust out of contact with the work. When the shaft |12 is rockedclockwise in Fig. 4, the pressure idler wheel |20 and the ejector aresimultaneously raised, the ejector lifting the released work over thesupporting idler 66 to the exit chute ||0. The ejector then operates asa work loader as will appear. The work is automatically fed to themachine from a magazine (see Figs. 4 and '7). On the at top of theextension |80 of the bracket |16 is fastened an angle bracket having -ahorizontal leg 202 and an upright leg 204. 'I'he latter has L-shapednotches 206 at its upper edge to detachably and adjustably receiveclamping studs 200 which are riveted to a magazine side wall 2|0. Thisside wall has an inclined fin 2|2 projecting from 'it laterally, andwork pieces placed on the 11n roll down it towards a rear fin 2|4. Therear iln is joined to a bottom iin 2| 6 which inclines downwardly tomeet a vertical iin 2|8. The iln 2|8 terminates in a lip 220 which tltsclose up to the regulating wheel 54. The magazine side wall 2|! also hasa vertical iront iin 222 who upper end is inclined backwardly at 224.The iins are preferably welded to the side wall and slots`226 in theside wall provide for inspection oi the work-pieces as the latter rollof supporting studs 228 which are riveted to it and project laterally toslidably receive supporting sleeves 230 on a companion side wall 232which is parallel to the side wall 2 I0. Set screws 234 provide means tosecure the side wall 232 at the desired distance from the side wall 2|0to suit the length of the work. The side wall`232 .has an inclined slot236 to clear the inclined fin 2|2 and has a triangular notch 238 at thefront to receive the inclined end 224 of the vertical n 222. Elsewherethe side-wall 232 fits within the fins of the side wall 2I0. and 19) issecured to the lower portion of the side wall 232 and carries a sleeveportion 242 which is slidably adjustable on a stud 244 which is rivetedto a little bracket 246 fastened to the rear of the vertical fin 2|8,thus giving the side Wall 232 a third point of support. A bolted-onextension side wall 248 projects downwardly from the side wall 232 andterminates in a curved edge 250 which is arranged to slightly overlapthe corresponding end of the work and act as an abutment therefor. Thisextension takes the thrust induced on the work by the skewed idler |20and preferably has hardened inserts 25| (Fig. 17)` to take the wear. Theside wall 2|0 also has a separate bolted-on extension 252 but thispreferably does not loverlap the work as the wheel flange 64 is in thesame plane and prevents axial movement of the work. An escapement orbaffle plate 254 (Fig. 4) projects between the bolted-on extensions 248and 252, and is attached by a screw 256 to a portion of the guard |42.This escapement or baffle plate co-operates with the magazine lip'220 toretain the articles in the magazine and it is lifted with the pressureidler |20 to release or drop a new piece onto the ejector |88 which thenlowers the piece to grinding position as indicated in Figs. 14 to 1'1.

For actuating the rock shaft |12, a lever 268 (Fig. 8) has .its hub 262keyed to one end of the shaft, the. longer arm of the lever having aconcave seat for arcuate side ribs 264 on a. washer 268 which rests on acoiled expansion spring 268. The spring bears against a flange210 on ahollow enlargement 212 of an adjusting rod 214 having a hand wheel 216.A rod 218 is threaded in the enlargement 212 and has its lower endanchored by a screw 280, to the ller plate I2. The coil spring urges therock shaft |12 clockwise in Fig. 8 and its tension can be adjusted byturning the hand wheel. The short arm of the lever 260 has a recessedseat 282 for a ballended rod 2 84 whose lower end is seated in a recessof a plunger 286 which is slidable vertically in a bushing 288 carriedby the base plate 48. The downward movement ofthe plunger is limited bya ange 290 and the plunger is held from turning by a key pin 292enteringa slot in the bushing 288.

The lower end of the plunger carries a cam roll 294 running on the uppersurface of a cam plate 296 contained in the previously mentioned notch20 in the filler plate I2. The cam plate is anchored against shiftingmovement aswill appear while all the adjacent parts reciprocate with thetable or slide. The cam plate is accordingly supported on several rowsof balls held in openings of a separator plate 298 and running on a fiatrace plate 300, all these parts being contained in the slot 20. The camplate has a cam incline 302 (Fig. 2) which co-operates with the camroller 294 to reciprocate the plunger 286.

A notch is formed in one side of the incline and 75 one end of it isprovided with a secondcam 304 A plate 240 (Figs. 7

for operating a gauge rod as will appear. To anchor the cam, a tie rod306 (Fig. 1) is threaded in one end of the cam plate and locked by a nut308. The other end of the tie rod is threaded in one end of an anchorscrew 3I0 and locked thereto by a nut. The anchor screw is adjustablysecured in 'a bracket 3|2 on the main frame by nuts 3|4. This anchorsthe cam plate from movement although, by tunilng the nuts 3|4, the camplate can be adjusted endwise in order that the. cam inclines 302 and304 will-come *into action at the proper time in the reciprocation ofthe work head. l

During grinding, the work-piece W is gauged upon every reciprocation ofthe work head. There are two gauge plugs 320 (Fig. 1) differing slightlyin diameter with the smaller in advance.

As the work approaches size, the smaller plug enters the work andcontrols an amplified reciprocation of the work head so that thegrinding wheel can be dressed by any suitable mechanism. As grinding isresumed andthe work reaches size, the second gauge plug enters andcontrols a final retreating movement of the work head during which thework is ejected. These amplified movements are effected by suitable tripmechanism acting on a reversing mechanism and are well known in the art.The gaugediscs 320 are secured to the end of a shiftable gauge rod 322which is hollow to provide a passage 324 for liquid cooling medium. Thegauge rod is mounted for rotation and for reciprocation in a pair ofroller bearings 326 carried in recesses at the opposite ends of asupporting sleeve 328. The bearing nearest the grinding wheel isprovided with a suitable packing held in a threaded cap 329. The sleeveis clamped in an opening of a cross slide 330 by a handscrew 33|, theslide being adjustable from front to rear on ways 332 under control of ascrew 334 which is mounted for rotation without endwise movement in aplate 336. This adjustment is to keep the gauge plugs 320 concentricwith the work, vit being understood that work-pieces of all sizes aresupported at the same level but that larger pieces have their centersfarther to the front.

The gauge rod 322 has one end passed through a horizontal -slot 338 inan upright bracket -340 (Figs. l, 9, l and 18) having ballthrust-bearings 342 at each side, one such bearing engaging a shoulderbearing being h eld on the gauge rod b nuts 346. The bearings providefor rotation of the gauge rod, and the horizontal slot permits thebeforementioned horizontal adjustment of the gauge rod by the crossslide 330. The end ofthe hollow gauge rod is flared to form a conicalseat for a conical surface on a hollow head 348- to which cooling mediumis supplied by a flexible pipe 350. A leaf spring 35| attached to thebracket 340 holds the conical surfaces seated. The lower` portion of thebracket 340 has an enlarged sleeve portion 352 adjustably secured to thethreaded end of a control rod 354 by nuts 356, this adjustment dependingon the length of the workpieces. The control rod is slidably mounted inbushings 358 and 360 secured in horizontal openings in the filler plate|2. The opening nearest the grinding wheel is sealed-up by packings 362held by a cover plate 364. The corresponding end of the control rod 354is arranged in line with an abutment screw 365 adjustably carried by anyconvenient stationary portion of the grinding wheel support. Thisabutment will prevent the gauge plugs 320 from coming in contact 75 344`of thegauge rod and the other with the grinding wheel as when the workand the gauges iinish their strokes towards the grinding wheel. When thework head is retracted to inoperative position, the gauge plugs aremoved away from the work, as will appear, but whenever the` work headadvances to grinding position, the gauge plugs are urged against the endof the work by spring pressure.

An arm 366 projects forwardly from the bracket 340 and is provided witha guide sleeve 368 slidably supported on a. guide rod 318 which is xedby a set screw in the beforementioned lug 24 of the ller plate I2. A lug314 projecting downwardly from the guide sleeve 368 adjustably supportsa threaded rod 316 connected to a. coil spring 318 which is anchored at388 to the reciprocating table or slide 8. A sleeve 382 (Fig.

6) is pinned to the control rod 354 and has a forwardlyprojectingbracket or arm 384 which isslidably guided by the guide rod 310. 'I'hearm 384 has a. depending portion 386 in which a pair of knock-of! screws388 are adjustably secured These screws are arranged to strikesuccessively against dogs 392 (Fig. 4) projecting from a housing 394.'Ihe dogs mechanically control the reversing mechanism o1' thereciprocating table, the rst dog being actuated when the smaller gaugeplug enters the work and the second being actuated when the larger gauge4plug enters. To control the movement of the gauge plugs into yieldingcontact with the work by means of the coil spring 318, a. split collar396 is clamped to the control rod 354 and has an upwardly projectingroller stud 398 bearing against a cam-operated lever 480. The lever hasan upwardly projecting vpivot stud 482 and a short arm carrying a camroller 404 which runs along the vertical side of the cam plate 296 `toand from the side cam 384. The lever is contained in a recess 486 of aholding plate 488 which is partially contained in a recess 4|8 of thebase plate 48.

While the cam roller 404 is in contact with the vertical side of the camplate 286, the gauge plugs areheld back a. little' way from the work butwhen the workhead advances far enough for the cam roller to pass theside cam 304, the smaller plug will yieldingly engage the end of thework piece to test the size of the bore. The plugs will be frictionallyrotated by Contact withthe work. As the gauge'plugs continue to advance(while yieldingly held against the advancing work) and approach closelyto the grinding wheel, the control rod 3514 will strike the adjustableabutment screw 365 and arrest the gauge parts from further` advancealthough the work and lits supports will continue the stroke until theremaining surface of the work has traversed over the grinding Wheel. Asthe reciprocating table then reversesythe control rod 354 leaves theabutment screw 365 and the work catches up to and again engages thegauge. plugs. When the work is ground down so that the first gauge plugenters the work, ene of the clogs 392 -is actuated to cause an amplifiedwithdrawal stroke of the table so that the grinding wheel can bedressed. When the second completed work, the other dog 392 is actuatedand the table makes a final` retreat. In this retreat, the gauge plugsare retracted under control of the 'side cam 384, and the pressure idler|20 is lifted under control of the cam 302. The ejector |98 is of courselifted also and the finished piece. thereby pushed over thesupportingidler 66 to the exit chute H8. Meanwhile the gallge plugenters the piece down to grinding position while the pressure idlercomes down and engages the piece. Then the gauges advance and yieldinglyengage the work asbefore. The preferred directions of rotation of thewheels are indicated by the arrows in Fig. 14.

Figs. l1 and 12 illustrate a modiiication of the feeding and ejectingmechanism. A swinging arm 420 is pivoted on the shaft ,14`and carries anarcuate plate 422 which just clears the regulating wheel 54. One end ofthe plate forms an ejector 424 for lifting the piece over the idler 66,the arcuate plate thereafter catching the next piece released from themagazine and the ejector subsequently letting the piece down to Ygrinding position.- To actuate the arm 420, a link 426 is pivotallyconnected to it and to an extension.428 of the arm |44. The extensionhas a slot 438 for an adjustable pivot 432 so that the throw of the linkand ejector can be' adjusted.

With this construction, the ejector is carried by the idlerwheel 66 anddoes not need adjustment with respect to the latter when the slide 82 ismoved along its incline.

In both forms, the magazine outlet lies adjacent to the work receivingspace and between the pressure idler |28 andthe regulating wheel 54While the ejector normally lies between the supporting idler 66 and theregulating wheel. With a short throw of the ejector to a locationdirectly over the low supporting idler, or between such idler and themagazine, the iinished Work is pushed through the discharge space to the-incllned chute. Meanwhile the baille plate 254 has released the nextfollowing work-piece which drops onto the ejector and regulating wheel.

This piece is lowered by the ejector to grinding position, the ba'ieplate and pressure idler returning to normal position with the ejector,and the baille plate arresting the remaining workpieces. The ejectingand loading is accomplished v simply, directly and quickly by asimultaneous vand short movement of ejector, baille plate and pressureidler, all operated from a single rock shaft. i

Assuming a work-piece is in grinding position, the work-headreciprocates to traverse the work across the grinding wheel. On eachstroke of the right in Fig. 1, the cam roller 484 reaches the cam 384and releases the lever 480, the lever releasing the control rod 354. Thecoil spring 318 urges the smallergauge plug 328 against the end of thework to test its diameter. The plug cannot reach the grinding Wheelbecause the control rod 354 will previously be arrested by contact withthe abutment screw 365. `When the smaller gauge plug entersOthe work,the control rod andthe knock-off screws are permitted a little extramovement to theright, sufficient for one of them to operate one of thedogs 392. v'Ihis results in anamplied withdrawal movement of the workhead to the left during .which interval the grinding wheel may bedressed and the crossfeed reduced according to the common practice.Grinding is resumed and continued until the second gauge plug enters thework. This gives the other knock-off screw 388 a little further advanceto actuate its co-operating dog 392. This controls the final remoteretreat of the work head to the left. :The cam roller 484 leaves the cam384 and rides along the side of the anchored paragraph to eject thefinished work and intro- Vduce a new work-piece.

I claim: d

1. In a machine -of the character described, a pair of work supportingmembers at different levels for engaging a round work-piece at angularly.spaced locations, a pressure member opposed to the supporting membersfor holding the work against them, means for moving the prssure memberto provide a work discharge space .between it and the lower one of thesupporting members, and means for pushing the work radially into thedischarge space to discharge it over the lowersupporting member andlaterally thereof substantially as described.

2. In a machine of the character described, a pair of work supportingmembers at diierent levels for engaging a round Work-piece at angularlyspaced locations, a pressure member opposed to the supoprting membersfor holding the work against them, meansv for moving the pressurelmember to provide,v a work discharge space between it and the lower oneof the supporting members, an ejector between the work supporting'members, and means for moving the ejector to a point above said lowersupporting member to roll the work over the latter; substantially asdescribed.

3. In a machine of the character described, kKa. pair of `worksupporting members for engaging a round work-piece at angularly spacedlocations, a pressure member opposed to the supporting members forholding the work against them, an arm carrying the pressure member,means for moving the aim to provide a work discharge space between thepressure member and one of the supporting members, an Vejector forraising the work radially over one of the supporting members into saiddischarge space, an arm connected to the ejector, and a common actuatingmeans or moving the arms of the pressure member and t e ejector in thesame direction to cause the ejector to push the work-piece into saiddischarge vspace as said space increases; substantially as described. 4.In a machine of the character described, a pair ci work supportingmembers for engaging a round work-piece at angularly spaced locations, apressure member opposed to the supporting members for holding the workagainst them, means for moving the pressure memberto provide a workdischarge space between it and one of the supporting members, an ejectorbetween the pair of supporting members, means for moving the ejector outfrom between the supporting members to push the work-piece between thepressure member and said one supporting member, and a magazine having anoutlet portion to introduce a workpiece between the pressure member andthe other supporting member; substantially as described.

5. In a machine of the character described, a pair of worksupportingmembers for .engaging a round work-piece at angularly spacedlocations, a pressure member opposed to the supporting members forholding the work against them, means for moving the pressure membertoprovide a workdischargespace between it and one of the supportingmembers, a 'magazine having an outlet portion between thevpressuremember and the other supporting member, and means for ejecting awork-piece radially through s'aid space; substantially as described.

6. In a machine of thefcharacter described, a pair of work supportingmembers for engaging a round work-piece at angularly spaced locations,apressure 'member opposed to the supporting members for holding the workagainst them, a magazine having an outlet portion between the pressuremember and one of the .supporting members, a mounting for shifting thepresure member away from both of the supporting members to tween thepressure member and one of the supl porting members, and means forshifting the pressure member and the ejector in afdirection away fromboth the supporting members to introduce a new work-piece between thepressure member and said one supporting member and to eject a work-pieceradially between the pressure member and the other supporting member;substantially as described.

8. In a machine-of the character described, a pair of work supportingmembers, a pressure member oppsed to the supportingmembers, an ejectorbetween the supporting members, a magazine having an outlet portionbetween the pressure member and one of the supporting members, and meansfor shifting the ejector to a location between the other supportingmember and the magazine outlet to eject a work-piece transversely f oversaid other supporting member and receive another work-piece on theejector and said one supporting member from said outlet; substantiallyas described.

9. In a machine oi' the character described, a

pair of work supporting members, a pressure member opposed to thesupporting members, an

ejector between the supporting members, a. magazine having an outletportion between the pressure member and one ofthe supporting members,means for shifting the ejector to a location between the othersupporting member and the magazine outlet to eject a. work-piece oversaid larly spaced locations, an ejector between the supporting members,a magazine having an outlet portion adjacentto the work-receiving space,means for reciprocating the .ejector to and from va point in thework-receiving space to eject a work-piece over the lower one of thesupporting members and to lower another work-piece onto the supportingmembers, and a baille plate for retaining work-pieces in 'the'magazineoutlet and movable to release said other work-piece onto the ejector;substantially as described.'

11. In a machine of 'the' character described.

,a pair of workl supporting members at different levels for engaging around work-piece at angug levels for engaging a round work-piece atanguvlarly spaced locations; an ejector between lthe supporting membersand arranged to engage the periphery of the work-piece, a magazinehaving an outlet portion adjacent to the work-receiving space, a bailleplate shiftable with respect to the outlet, an inclined exit chutesubstantially tan-g.

' gent to the lower supporting member, means for shifting the ejectorinto and out of a position directly over the lower one o f thesupporting members to` discharge the work onto said exit chute,

and means for causing the baille plate to shift simultaneously with'theejector;` substantially as described.

13. In a machine of the character described, a pair of work supportingmembers at different levels for engaging a round work-piece at angularlyspaced locations, an exit chute -inclined downwardly away from the lowerone of the supportingk members and substantially tangent to its uppersurface, a work ejector between the work supporting members and mountedto shift therefrom to a position over the lower supporting member, andmeans for actuating the ejector substantially radially against the outerperiphery of the work-piece to roll the: work-piece transversely oversaid lower supporting member to the exit chute: substantially asdescribed.

14. In a machine of the character described, -a pair ofwork supportingmembers one of which is a regulating wheel, a magazine having an outletportion adjacent to the regulating wheel, one of the side walls of themagazine overlapping one 4end of a work-piece carried on the supportingmembers, and means for urging the work-'piece against said side wall;substantially as described. 15. In a machine of lthe characterdescribed, a

pair of work supporting members one of which' is a regulating wheel, amagazine having an outlet portion adjacent to the regulating wheel, thewheel having a projecting ange overlapping one end of a work-piece, andthe magazine having a side wall overlapping the other end of theworkpiece; substantially as described.

16. In a machine of the character described, a. pair of worlgupportingmembers one of which is a regulating wheel, a pressure wheel opposinglthe supporting members, a magazine having an outlet portion adjacent tothe regulating wheel, one of the walls of the magazine overlapping oneend of a work-piece, and the pressure wheel being skewed with respect tothe work-piece to urge it against the overlapping side wall;substantially as described. e

17, In a machine of the character described, a pair of work supportingmembers one of which is a regulating wheel, a magazine having an outletportion adjacent to the regulating wheel, the rear wall of the magazinehaving a terminal portion substantially tangent to the wheel, and themagazine also having a side wall arranged to overlap one end of awork-piece carried on the supporting members; substantially asdescribed. 1'8. In a machine of the character described,

a pair of work supporting members one of which is a regulating wheel, almagazine having an outv let portion adjacent to, the regulating wheel,the

rear wall of the magazine having a terminal portion close to theregulating wheel, a work,

retaining and releasing member at the front of said outlet, and meansfor moving said last member towards or from saidrear wall; substantiallyas-described.

19. In a machine of the character described', a pair of work supportingmembers one of which is a regulating wheel, a magazine having an outletportion adjacent to the regulating wheel, the rear wall of the magazinehaving a terminal portion substantially tangent to the wheel, themagazine having a side wall overlapping one end of a work-piece carriedon the supporting members, and a work retaining and releasing baille atthe front of said outlet and movable towards and from said rear wall;substantially as described.

20. In a machine of the character described, a pair of work supportingmembers for engaging a round work-piece at angularly spaced locations, apressure member opposed to the work supporting members, a work ejectorbetween the supporting members, and a rock shaft having arms carryingthe pressure member and the ejector;`

a round work-piece at angularly spaced locations, an ejector between thesupporting members, a rock shaft having an arm carrying the ejector,means for adjusting one of the supporting members with respect to theother, and means for varying the length of the ejector carrying arm;substantially as described.

22. In a machine of the character described, a pair of worksupportingmembers for engaging a round work-piece at' angularly spacedlocations, a pressure member opposed to the work supporting members, anejector between the supporting members and adjacent to the .periphery ofthe work-piece, means for moving the pressure member towards and awayfrom the Supporting members, and an operating connection between theejector and said moving means for shifting the ejector substantiallyradially against the periphery of the work-piece from its positionbetween the supporting members; substantially as .described.

23. In a machine of the character described,

a pair of work supporting members for engaging a round work-piece atangularly spaced locations, a pressure member opposed to the worksupporting members, an ejector, an arm for swinging the pressure member,and a link connecting the arm with the ejector; substantially asdescribed.

24. In a machine of the character described, a pair of work supportingmembers for engaging a round work-piece at angularly spaced locations, apressure member opposed to the work supporting members,an ejector havinga supporting arm pivotally carried by one o f the supporting members, anarm for swinging the pressure member, and a connection between the arms;substantially as described.

25.- In a machine of the character described, a pair of work supportingmembers for engaging a round work-piece at angularly spaced locations, apressure member opposed to the work supporting members, an ejectorhaving a supporting arm pivotally carried by one of the supportingmembers, means for adjusting said one supporting member with respect tothe other, an arm forswinging the pressure member, and a link the shaftand the surrounding arm to tilt the shaft transversely therein forskewing the wheel with respect to the work-piece; substantially asdescribed. l

27. In a machine of the character described,

- work supporting means, a pressure wheel opposed to theworkasupportin'g means, a shaft rotatably supporting the wheel, a shaftsupport having a" pair of arms surrounding the shaft,`and opposedscrewsthreaded in one of the arms to tilt the shaft transversely for4 skewingthe wheel with respect to a work-piece on the worksupporting means;substantially as described.

28. In a machine of the character described, means for rotatablysupporting .a round workpiece and including a supporting the wheel, ashaft support having means for tiltably supporting for shifting theother end of the shaft with respect to the support to skew the wheel andthereby urge the work-piece endwise; substantially as described.

29. In a machine of the character described, means for rotatablysupporting a round workpiece andA including a wheel peripherallyengaging the work-piece, a shaft rotatably supporting the wheel', ashaft support, one end 'of the shaft having a ball and socket engagementwith the support, and means acting between the support and anotherportion of the shaft to skew the shaft and wheel with respect to thework-piece; substantially as described.

30. In a machine of the character described, means for rotatablysupporting a round workpiece and including a wheel peripherally engagingthe work-piece, a shaft rotatably supporting the wheel, a shaft supporthaving a pair of arms, one of the arms providing a tiltable mounting forthe shaft, and a pair of opposed adjusting members interposed betweenthe other ,arm and the shaft; substantially as described.

3l. In atmachine of the character described, meansfor rotatablysupporting a round workpiece and including a wheel peripherally engagingthe work-piece, a shaft rotatably supporting the wheel, a shaft supporthaving a pair of arms, i

one of the arms having a socket, the shaft having a ball in the socket,the other arm having an opening for the shaft, and means for shiftingthe shaft crosswise'of the opening; substantially as described.

32. In a machine of the character described, work supporting means, awork abutment, a pressure wheel opposed to the work supporting means,v ashaft rotatably supporting the wheel, a shaft support comprising a pairof arms, one end of the shaft having a ball nd socket engagement withone of the arms, the other arm having an opening for the other end ofthe shaft, and means for shifting said other end of the shaftcross'wi'se of the opening to skew the wheel with respect to awork-piece on the supporting means; substantially as described..

33. 'In a machine of the character described,

a wheel, a shaft rotatably supporting the wheel,

wheel peripherally engag-l ing the work-piece, a shaft rotatably one endof the shaft, and means a shaft support having a pair of arms, one ofthe arms providing a tiltable support for thel shaft, the other armhaving an opening for the shaft, a thimble on the shaft and havingopposite sides provided with flats, and opposed screws'in said other arm.and engaging the flats; substantially as described..

34.,-In a machine of the character described, a frame,`a work headhaving a guide slot, a gauge, a cam in the guide slot and anchored tothe frame, means for reciprocating the work head with respect to theframe, a cam follo'wer carried by the work head, and means connected tothe cam follower for causing the movement of the cam follower along thecam to shift the gauge; substantially as described.

35. In a machine of the character described, a frame, a work head havinga guide slot, a cam in the guide slot and anchored to the frame, theworkhead having a member movable to release a work-piece, a cam followercarried by the work head, and means connected to the cam fol-l lower forcausing the movement of the cam follower along the cam to shift themovable member away from the work-piece; substantially as described.

36. In a machine. of the character described, work holding means havinga member movable into or out of holding engagement with a workpiece, arock shaft for moving the member, an arm connected to abutments, oneofthe abutments'being on the arm and the other abutment being normallystationary, a coil spring engaging the abutments, a rod extending intothe coil spring, the rod and said other abutment having a threadedconnecthe shaft, a pair of opposed tion whereby relative rotation willshift said other abutment; substantially as described.

37. In a machine of the character described, work holding means having'amember movable `into orout of engagement with a work-piece, a rock shaftfor moving the member, an arm connected to the rock shaft, a rotatablerod extending through the armand having an abutment, a spring betweenthe abutment and .the arm. and surrounding the rod, the rod having aportion provided with internal threads, and a screw anchor memberengaging substantially Y.as described.

38. In a machine of the character described, work holding means having amember movable into. or out of engagement with a work-piece, a

rock shaft for moving the member, an arm conlnected to the shaft, arotatable member carry-` ing a spring abutment, a spring between theabutment and the arm,`and an anchoring member having screw threadedengagement with the abutment carrying member; substantially asdescribed.

39. In a machine of the characterdescribed, work supporting and rotatingmeans comprising a rotatable regulating wheel vfor peripheral rollingengagement with around work-piece,

means for holding the Work-piece in rolling con-` mem tact withthe/wheel, a grinding er opposed to the regulating wheel, means grindingmember and the regulating wheel to have relative reciprocation vto grindthe workpiece, a ring at the endof the regulating wheel and forminganannular projection extendingbeyond the periphery of the wheel, andmeans for detachably securing the ring to the end of the wheel toprovide for facing the periphery of the wheel by the grinding memberwhen the ring is removed; substantially as described.

for causing the' said internal threads;

work supporting and rotating means comprising.

a rotary wheel, a bracket having a chamber with an outlet slot adjacentto the wheel, and means for supplying coolant to the chamber;substantially as described.

41. In a machine of the character described, a magazine having asidewall provided with a laterally projecting work supporting iin, acompanion side wall having a slot for the n, and means for adjustablysupporting the companion side wall at selected distances from the firstside Wall; substantially as described.

42. In a machine of the character described, a magazine having a sidewall provided with laterally projecting work supporting ns, one of thens sloping downwardly towards the rear, another of the fins forming abottom wall sloping downwardly towards the front, anda companion sidewall Qspaced from the rst side wall; substantially as described.

, 43. In a. machine of the character described, a magazine having a sidewall provided with laterally projecting work supporting ns, one of thens sloping downwardly towards the rear, 1

, another ofV the fins forming a bottom wall sloping downwardly towardsthefront, and another of the ns forming a front wall; substantially asdescribed.

RAYMOND H. CRAMER. 1

